Sorry but you understand that English is not my first language.
Of course, this thread is about Catalina's support. It was just my comments, and it was on not in good English...
I will try to do my best now.
These bugs are not very important just a little annoying.
I will install and test the supplemental update to see if there is an improvement : Perhaps my humble feedback will be useful
( I have three systems :
MacPro Build 1: i9-7940X, Asus Prime X299 Deluxe, 2x VEGA 56 : currently on Mojave my main system.
iMacPro Build 2: i7-7800X, Gigabyte UD4 PRO, Sapphire Nitro+ RX 580 : updated on Catalina and used to post here now.
iMacPro Build 3: i5-7640X, EVGA X299 , RX560 :updated on Catalina
Roll back to Mojave is more complex for different reasons.)